First would be to buy a better water pressure regulator. Buying one that is adjustable made my showers a night and day difference. Yes, they regulate to approx. the same pressure, but the flow is much greater on the adjustable unit. The one I use can be found here:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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Totally agree! Those little water flow "restrictors" are just that, they reduce the pressure by restricting the flow, that's why they usually give them away when buying a new rv.
#2 if it hasn't already been mentioned is a surge protector/EMS is, in my opinion, an absolute necessity with all the electronic equipment of these rvs nowadays.